20423319 has 16 divisors (see below), whose sum is σ = 31200768. Its totient is φ = 11640672.

The previous prime is 20423257. The next prime is 20423329. The reversal of 20423319 is 91332402.

It is not a de Polignac number, because 20423319 - 2²⁴ = 3646103 is a prime.

It is a super-2 number, since 2×20423319² = 834223917951522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9229 + ... + 11225.

It is an arithmetic number, because the mean of its divisors is an integer number (1950048).

Almost surely, 2^20423319 is an apocalyptic number.

20423319 is a deficient number, since it is larger than the sum of its proper divisors (10777449).

20423319 is a wasteful number, since it uses less digits than its factorization.

20423319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 20423319 is about 4519.2166356571. The cubic root of 20423319 is about 273.3435142285.

The spelling of 20423319 in words is "twenty million, four hundred twenty-three thousand, three hundred nineteen".